Anna Staver, "Man threatens to blow up state building over misspelled sign: Suspect blames failure to detonate on misspellings in instructions", Stateman-Journal, 5/29/2013:
A man brought a pressure cooker he claimed was a bomb into the Teacher Standards and Practices Commission office and told employees he tried to blow up their sign because it was misspelled on Wednesday morning. […]
Leonard Burdek, 50, of Salem, told Chamberlain and the receptionist that he tried to blow up the agency’s outside sign, but the bomb didn’t work.
The sign spells out the agency’s name in blue letters and sits at the end of its parking lot at 250 Division Street NE. One side is missing the letter “D” in the word “and” so it reads: “Teacher Standards an Practices Commission.”
She didn’t know what happened to the sign, but Chamberlain said it’s possible that someone scraped the letter off or it wore off over time.
After discussing his failed attempt to detonate his bomb, the man complained that the instructions he downloaded to make the bomb also had misspellings.
This is a more pointed reaction than that of the "grammar vigilantes" of 2008, described by Andrew Mueller at the Guardian as "a small but righteous crew [who] are traversing America in order to edit it".